Sophora prostrata
Kōwhai
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Kōwhai (Sophora prostrata) - Description
Sophora prostrata is commonly known as kōwhai, prostrate kōwhai or dwarf kōwhai and grows naturally in the eastern South Island from Marlborough to the Waitaki Valley in New Zealand. It is a low growing shrub reaching a height of around 2 metres. This species has a divaricating habit that lasts for the life of the shrub. The leaves of this species are usually quite small up to about 2cm in length. Flowers are often orange though they do occur as yellow like most other kowhai species.
Kōwhai (Sophora prostrata) - Blooming
S. japonica has mid to late summer large airy pyramidal clusters of small creamy flowers for 2-3 weeks, giving it a lacey look. It may not flower until tree is 10 years old. Flowers best during long, hot summers.
Kōwhai (Sophora prostrata) - Growth
Varied genus or trees, shrubs, and herbs. Leaves are pinnately compound and seedpods are rounded or winged and tightened between seeds. S. japonica, the pagoda tree grows to 50-75 feet. Grows best in full sun. Sophora works well in a shrub border or as an ornamental plant. Less hardy plants can be grown at the base of a sunny wall, or in a temperate or warm greenhouse.
Kōwhai (Sophora prostrata) - Planting
Sow seeds when ripe in containers in a cold frame. Can also propagate evergreens from semi-ripe cuttings in summer or fall.
Kōwhai (Sophora prostrata) - Pest
Sophora is prone to wilt, canker, rust, and twig blight.
Kōwhai (Sophora prostrata) - Soil and irrigation
Moderately fertile, moist, acidic to alkaline, well-draining soil.
